My Phantom pulls noticeably to the left when I try to fly it straight forward in GPS mode. I also see a bit of the TBE when hovering in GPS mode. The NAZA manual talks about rotating the GPS to remedy that; however, that's clearly not going to happen on this unit with the GPS screwed into the shell the way it is. The manual also states, "Should you find the multi-rotor does not track straight... carry out several more courses, the system will fix itself automatically." Haven't found that to be the case either. It does seem to fly straight backwards in GPS mode. And when I switch to ATTI mode, it flies perfectly straight in any direction. I've re-calibrated the compass and performed advanced IMU calibration to no avail. While I'm trying to spend less time in GPS mode at this point, I would still certainly like for it to fly a straight line when I do use it. I'm using "perfectly" balanced 8" carbon fiber props (for whatever that's worth), Zenmuse H3-2D gimbal, and the Futaba 8FGS controller. Any thoughts?